US5996708A - Percussion tool - Google Patents

Percussion tool Download PDF

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Publication number
US5996708A
US5996708A US09/111,262 US11126298A US5996708A US 5996708 A US5996708 A US 5996708A US 11126298 A US11126298 A US 11126298A US 5996708 A US5996708 A US 5996708A
Authority
US
United States
Prior art keywords
stop
elastic ring
header
stop disc
percussion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US09/111,262
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English (en)
Inventor
Peter Gerold
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hilti AG
Original Assignee
Hilti AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hilti AG filed Critical Hilti AG
Assigned to HILTI AKTIENGESELLSCHAFT reassignment HILTI AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GEROLD, PETER
Application granted granted Critical
Publication of US5996708A publication Critical patent/US5996708A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D16/006—Mode changers; Mechanisms connected thereto
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D16/003—Clutches specially adapted therefor

Definitions

  • the present invention relates to a percussion tool, such as a hand-held drill or a chisel tool, and including a header displaceable in the tool chuck, a damping member for damping rebounds of the header and cooperating with a stop surface which is provided at a rear, with respect to the operational direction of the percussion tool, end of the header, with the damping member including arranged one after another a stop disc, an elastic ring and a transmission element, and a percussion mechanism including a guide cylinder defining a stop for the damping member.
  • German document DE-OS 41 35 240 discloses a percussion tool such as a drill or a chisel tool having a percussion mechanism with a guide cylinder and a tool chuck.
  • the guide cylinder receives a percussion piston, which is driven by a swash plate mechanism, and a float piston driven by the percussion piston.
  • An axially displaceable header is located in central bore of the chuck in its rear, with respect to an operational direction, end region. During the operation of the percussion tool, the header cooperates with a shank of a tool inserted in the tool chuck at the front end surface of the chuck.
  • the portion of the header remote from the tool shank has a cylindrical cross-section and a reduced diameter.
  • the rear cylindrical portion of the header extends through a damping member provided between a stop, which is formed on the guide cylinder of the percussion mechanism, and the stop shoulder formed at the rear end of the header.
  • the damping member serves for damping rebounds of the header and is formed of a stop disc cooperating with the header, a transmission element supported against a stop provided on the guide cylinder of the percussion mechanism, and an elastic ring arranged between the stop disc and the transmission element.
  • the stop on the guide cylinder is formed by a locking element formed as a snap ring which projects into an annular indentation formed on the inner side of the guide cylinder.
  • a serious drawback of the prior art percussion tool consists in difficulties associated with mounting of the damping member because all elements of the damping member need be separately installed in the guide cylinder and aligned there.
  • an object of the present invention is to provide a percussion tool such as a drill or a chisel tool in which mounting and dismounting of the damping member can be effected rapidly, simply and economically.
  • the transmission element of the damping member serves for receiving and a subsequent large-surface transmission of the rebound energy, which is generated by the header, to the elastic ring.
  • the stop disc which cooperates with the header, is supported in the receiving cavity of the transmission element with a possibility of a limited axial displacement.
  • the spring characteristic of the damping member can be favorably influenced by mounting the elastic ring in the receiving cavity of the transmission element with a preload. In this way, already at the beginning of the axial compression of the elastic ring, an increased damping force is available. For manufacturing reason, advantageously, the limiting of the axial displacement of the stop disc and securing of the elastic ring is effected with a locking element which form-lockingly cooperates with the transmission element.
  • the mounting and securing of the stop disc and the elastic ring in the receiving cavity of the transmission element can be effected outside of the hand-held tool, so that the damping member can be inserted in the percussion tool as a unit.
  • the locking element is formed as a snap ring which projects into an annular indentation formed in the receiving cavity of the transmission element.
  • the transmission element is formed as a pot-shaped element the inner wall of which limit the receiving cavity.
  • the outer diameter of both the stop disc and the elastic ring substantially corresponds to the inner diameter of the receiving cavity.
  • the receiving cavity can have a somewhat larger diameter to provide for expansion of the elastic ring in the radial direction when the elastic ring is axially loaded during the rebounds of the header.
  • the elastic ring is formed preferably with a substantially elliptical cross-section with the larger diameter extending substantially parallel to the operational direction.
  • an axial displacement of the stop disc in a direction opposite to the operational direction, takes place in the receiving cavity.
  • a guide region in front of the stop disc, a guide region the outer diameter of which substantially corresponds to the inner diameter of the snap ring which projects into the annular indentation.
  • the axial or longitudinal extent of the guide region is greater than the width of the snap ring measured in a direction parallel to the operational direction.
  • a coaxial alignment of the stop disc with the annular stop surface of the header, which tapers in a direction opposite to the operational direction, during a joint rebound of the two parts is achieved by providing, at the front end surface of the stop disc, a conical, extending at least partially circumferentially, stop shoulder which likewise tapers in a direction opposite to the operational direction.
  • FIG. 1 shows a schematic view of a percussion tool according to the present invention
  • FIG. 2 shows, at an increased scale, a partially cross-sectional view of a front region of the tool shown in FIG. 1;
  • FIG. 3 shows a cross-sectional view along line 3--3 in FIG. 2.
  • a percussion tool according to the present invention such as a drill or a chisel tool, which is shown in FIG. 1, has a housing 2 at a rear, with respect to an operational direction, end region of which there are provided a handle 6 and a trigger 61.
  • An electric cable 5, which extends substantially transverse to the housing 2 projects into a region of the housing 2 located immediately adjacent to the handle 6 and connects a tool motor, which is located in the housing 2, with an external power source upon actuation of the trigger 61.
  • a tool chuck 1 for receiving a drilling or chisel tool (not shown).
  • the tool chuck 1 is connected with the housing 2 by a flange 3.
  • the flange 3 is connected with the housing 2 by several screws (not shown in the drawings).
  • a side handle 4 is located between the tool chuck 1 and the handle 6. The handle 4 is secured to a cylindrical region of the housing 2 and projects sidewise therefrom.
  • the tool chuck 1 has, at a rear, with respect to the operational direction, end region thereof, a central bore in which a header 9 is axially displaceable. At its rear free end, the tool chuck 1 has an annular surface which provides for axial connection of the tool chuck 1 with the housing 2 by the flange 3 which is fixedly connected with the housing 2 by screws, as discussed above.
  • a damping member 8 adjoins the rear end region of the tool chuck 1.
  • the header 9 has, at its rear end a cylindrical, reduced diameter portion 91 which extends through the damping member 8.
  • the damping member 8 serves for damping the rebounds of the header 9 and is formed of a pot-shaped transmission element 81 having a receiving cavity in which a stop disc 86 is located.
  • the stop disc 86 is supported in the receiving cavity of the transmission element 81 for a limited axial displacement therein.
  • An elastic ring 83 is located in the receiving cavity of the transmission element 81 between the stop disc 86 and a rear wall of the transmission element 81.
  • the elastic ring 83 has a substantially elliptical cross-section, with the larger diameter of the elastic ring 83 extending parallel to the operational direction as shown in FIG. 3.
  • the transmission element 81 has a side wall 82 which limits the receiving cavity.
  • the outer diameter of both the stop disc 86 and the elastic ring 83 substantially corresponds to the inner diameter of the receiving cavity.
  • the receiving cavity of the transmission member 81 has a greater diameter in the region in which the elastic ring 83 is received. The greater diameter of the receiving cavity in the region where the elastic ring is received, provides for radial deformation of the elastic ring 83 upon application of an axial load thereto.
  • the stop disc 86 and the elastic ring 83 are secured in the receiving cavity of the transmission member 81 with a locking element such as a snap ring 84.
  • the elastic ring 83 can be, e.g., preloaded.
  • the snap ring 84 projects into a annular indentation formed in the side wall 82 of the transmission element 81, which is formed in the front end of the transmission member 81.
  • the stop disc 86 and the inner wall 82 define together a guide region 85 the diameter of which corresponds to the inner diameter of the snap ring 84 and an axial extension of which is greater than a width B of the snap ring 84.
  • the guide region prevents bouncing of or ejection of the snap ring 84 out of the indentation formed in the side wall 82.
  • the elastic ring 83 is formed of an elastic material such as, e.g., rubber.
  • the stop disc 86 has, at its front end, a conical, at least partially circumferentially extending, stop shoulder 87 which widens in the operational direction and which cooperates with a stop shoulder 92 of the header 9.
  • the damping member 8 is located in the front cylindrical region of a central bore of the housing 2 and is supported against a stop 74 which is formed by a front end surface of a guide cylinder 73.
  • the guide cylinder 73 forms part of a percussion mechanism 7, which is not shown completely in the drawing.
  • the drawing also shows a percussion piston 71 and a float piston 72 of the percussion mechanism 7.
  • the damping member 8 can also be located, with a possibility of axial displacement, in a cylindrical front receiving region of the guide cylinder 73 when the guide cylinder 73 is likewise supported in the housing 2 with a possibility of axial displacement.
  • the guide cylinder 73 has a plurality of through-openings 75 formed in its wall which serve for aeration of the percussion mechanism 7 during operation of the tool.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Drilling And Boring (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
US09/111,262 1997-07-04 1998-07-06 Percussion tool Expired - Lifetime US5996708A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29711704 1997-07-04
DE29711704U DE29711704U1 (de) 1997-07-04 1997-07-04 Bohr- und/oder Meißelgerät

Publications (1)

Publication Number Publication Date
US5996708A true US5996708A (en) 1999-12-07

Family

ID=8042581

Family Applications (1)

Application Number Title Priority Date Filing Date
US09/111,262 Expired - Lifetime US5996708A (en) 1997-07-04 1998-07-06 Percussion tool

Country Status (4)

Country Link
US (1) US5996708A (fr)
EP (1) EP0888851B1 (fr)
JP (1) JP4195125B2 (fr)
DE (2) DE29711704U1 (fr)

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6241026B1 (en) 1999-05-08 2001-06-05 Black & Decker Inc. Rotary hammer
US20020125022A1 (en) * 2001-02-09 2002-09-12 Andreas Dieterle Hand guided electrical tool with an auxiliary handle
US20030083186A1 (en) * 2001-09-17 2003-05-01 Hetcher Jason D. Rotary hammer
US6732815B2 (en) 2001-03-07 2004-05-11 Black & Decker, Inc. Hammer
US20040231869A1 (en) * 2003-05-12 2004-11-25 Ralf Bernhart Hammer
US20050028995A1 (en) * 2003-08-06 2005-02-10 Hitachi Koki Co., Ltd. Impact drill
US20070158089A1 (en) * 2006-01-10 2007-07-12 Shun Tai Precision Co., Ltd. Pneumatic hammer drill (II)
US20080029283A1 (en) * 2006-08-07 2008-02-07 Hilti Aktiengesellschaft Hand-held power tool with pneumatic percussion mechanism
US7401661B2 (en) 2006-07-01 2008-07-22 Black & Decker Inc. Lubricant pump for powered hammer
US7413026B2 (en) 2006-07-01 2008-08-19 Black & Decker Inc. Lubricant system for powered hammer
US20080296034A1 (en) * 2006-06-06 2008-12-04 Willy Braun Percussion Mechanism with a Striking Pin and an Associated Catching Mechanism
US20090242223A1 (en) * 2008-03-28 2009-10-01 Makita Corporation Impact tool
US7624815B2 (en) 2006-07-01 2009-12-01 Black & Decker Inc. Powered hammer with vibration dampener
US7726413B2 (en) 2006-07-01 2010-06-01 Black & Decker Inc. Tool holder for a powered hammer
US20120125650A1 (en) * 2010-11-16 2012-05-24 Olaf Koch Hand-Held Machine Tool
US8590633B2 (en) 2006-07-01 2013-11-26 Black & Decker Inc. Beat piece wear indicator for powered hammer
US8636081B2 (en) 2011-12-15 2014-01-28 Milwaukee Electric Tool Corporation Rotary hammer
US20140144658A1 (en) * 2011-07-05 2014-05-29 Robert Bosch Gmbh Percussion mechanism apparatus
US9764457B2 (en) 2012-02-17 2017-09-19 Construction Tools Pc Ab Percussion device comprising a damping mechanism
US20180180128A1 (en) * 2015-06-29 2018-06-28 Terminator Ip Limited Shock absorbing tool connection
US10176114B2 (en) 2016-11-28 2019-01-08 Oracle International Corporation Row identification number generation in database direct memory access engine
US10459859B2 (en) 2016-11-28 2019-10-29 Oracle International Corporation Multicast copy ring for database direct memory access filtering engine
US10534606B2 (en) 2011-12-08 2020-01-14 Oracle International Corporation Run-length encoding decompression
US10599488B2 (en) 2016-06-29 2020-03-24 Oracle International Corporation Multi-purpose events for notification and sequence control in multi-core processor systems
US10614023B2 (en) 2016-09-06 2020-04-07 Oracle International Corporation Processor core to coprocessor interface with FIFO semantics
US10710172B2 (en) 2017-07-31 2020-07-14 Milwaukee Electric Tool Corporation Rotary power tool
US10725947B2 (en) 2016-11-29 2020-07-28 Oracle International Corporation Bit vector gather row count calculation and handling in direct memory access engine
US10783102B2 (en) 2016-10-11 2020-09-22 Oracle International Corporation Dynamically configurable high performance database-aware hash engine
US10814468B2 (en) 2017-10-20 2020-10-27 Milwaukee Electric Tool Corporation Percussion tool
US10926393B2 (en) 2018-01-26 2021-02-23 Milwaukee Electric Tool Corporation Percussion tool
US11113054B2 (en) 2013-09-10 2021-09-07 Oracle International Corporation Efficient hardware instructions for single instruction multiple data processors: fast fixed-length value compression

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10323606B4 (de) * 2003-05-20 2005-04-14 Robert Bosch Gmbh Elastische Döpperführung
JP5100171B2 (ja) * 2007-03-27 2012-12-19 株式会社マキタ 衝撃式作業工具
DE102013212597A1 (de) * 2013-06-28 2014-12-31 Robert Bosch Gmbh Schlagwerkvorrichtung

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US2035643A (en) * 1934-06-25 1936-03-31 Independent Pneumatic Tool Co Cushioning means for tools
US3266581A (en) * 1963-11-01 1966-08-16 Mechanical Res Corp Vibrationless power tool
US3625295A (en) * 1970-02-12 1971-12-07 Kent Air Tool Co Airhammer
US4476941A (en) * 1982-06-29 1984-10-16 Robert Bosch Gmbh Motor-driven hand-held percussion tool
US4653596A (en) * 1983-04-05 1987-03-31 Institut Gornogo Dela Sibirskogo Otdelenia An Sssr Percussive air tool
US4719976A (en) * 1985-02-26 1988-01-19 Robert Bosch Gmbh Hammer drill
US4732217A (en) * 1985-02-12 1988-03-22 Robert Bosch Gmbh Hammer drill
US5050687A (en) * 1988-09-23 1991-09-24 Prokhorov Ivan A Compression-vacuum action percussive machine
US5099926A (en) * 1990-04-05 1992-03-31 Makita Corporation Impact tool
US5363835A (en) * 1992-08-31 1994-11-15 Rocktec Limited Nose block assembly
US5407018A (en) * 1994-01-10 1995-04-18 Tc Services Pneumatic impact tool having improved vibration and noise attenuation
US5775441A (en) * 1995-05-25 1998-07-07 Makita Corporation Power driven striking tool
US5871059A (en) * 1995-02-28 1999-02-16 Makita Corporation Mechanism for preventing idling strikes in power-driven striking tools

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US4646852A (en) * 1985-02-14 1987-03-03 Senco Products, Inc. Pneumatic mallet

Patent Citations (13)

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Publication number Priority date Publication date Assignee Title
US2035643A (en) * 1934-06-25 1936-03-31 Independent Pneumatic Tool Co Cushioning means for tools
US3266581A (en) * 1963-11-01 1966-08-16 Mechanical Res Corp Vibrationless power tool
US3625295A (en) * 1970-02-12 1971-12-07 Kent Air Tool Co Airhammer
US4476941A (en) * 1982-06-29 1984-10-16 Robert Bosch Gmbh Motor-driven hand-held percussion tool
US4653596A (en) * 1983-04-05 1987-03-31 Institut Gornogo Dela Sibirskogo Otdelenia An Sssr Percussive air tool
US4732217A (en) * 1985-02-12 1988-03-22 Robert Bosch Gmbh Hammer drill
US4719976A (en) * 1985-02-26 1988-01-19 Robert Bosch Gmbh Hammer drill
US5050687A (en) * 1988-09-23 1991-09-24 Prokhorov Ivan A Compression-vacuum action percussive machine
US5099926A (en) * 1990-04-05 1992-03-31 Makita Corporation Impact tool
US5363835A (en) * 1992-08-31 1994-11-15 Rocktec Limited Nose block assembly
US5407018A (en) * 1994-01-10 1995-04-18 Tc Services Pneumatic impact tool having improved vibration and noise attenuation
US5871059A (en) * 1995-02-28 1999-02-16 Makita Corporation Mechanism for preventing idling strikes in power-driven striking tools
US5775441A (en) * 1995-05-25 1998-07-07 Makita Corporation Power driven striking tool

Cited By (51)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6241026B1 (en) 1999-05-08 2001-06-05 Black & Decker Inc. Rotary hammer
US20020125022A1 (en) * 2001-02-09 2002-09-12 Andreas Dieterle Hand guided electrical tool with an auxiliary handle
US6814156B2 (en) * 2001-02-09 2004-11-09 Hilti Aktiengesellschaft Hand guided electrical tool with an auxiliary handle
US6732815B2 (en) 2001-03-07 2004-05-11 Black & Decker, Inc. Hammer
US20040194987A1 (en) * 2001-03-07 2004-10-07 Andreas Hanke Hammer
US6948571B2 (en) 2001-03-07 2005-09-27 Black & Decker Inc. Hammer
US7032683B2 (en) * 2001-09-17 2006-04-25 Milwaukee Electric Tool Corporation Rotary hammer
US20030083186A1 (en) * 2001-09-17 2003-05-01 Hetcher Jason D. Rotary hammer
US7168504B2 (en) 2001-09-17 2007-01-30 Milwaukee Electric Tool Corporation Rotary hammer including breather port
US20040231869A1 (en) * 2003-05-12 2004-11-25 Ralf Bernhart Hammer
US20060248701A1 (en) * 2003-05-12 2006-11-09 Ralf Bernhart Hammer
US7093670B2 (en) * 2003-08-06 2006-08-22 Hitachi Koki Co., Ltd. Impact drill
US20050028995A1 (en) * 2003-08-06 2005-02-10 Hitachi Koki Co., Ltd. Impact drill
US20070158089A1 (en) * 2006-01-10 2007-07-12 Shun Tai Precision Co., Ltd. Pneumatic hammer drill (II)
US20080296034A1 (en) * 2006-06-06 2008-12-04 Willy Braun Percussion Mechanism with a Striking Pin and an Associated Catching Mechanism
US7413026B2 (en) 2006-07-01 2008-08-19 Black & Decker Inc. Lubricant system for powered hammer
US7401661B2 (en) 2006-07-01 2008-07-22 Black & Decker Inc. Lubricant pump for powered hammer
US7624815B2 (en) 2006-07-01 2009-12-01 Black & Decker Inc. Powered hammer with vibration dampener
US7726413B2 (en) 2006-07-01 2010-06-01 Black & Decker Inc. Tool holder for a powered hammer
US7814986B2 (en) 2006-07-01 2010-10-19 Balck & Decker Inc. Lubricant system for powered hammer
US8590633B2 (en) 2006-07-01 2013-11-26 Black & Decker Inc. Beat piece wear indicator for powered hammer
US20080029283A1 (en) * 2006-08-07 2008-02-07 Hilti Aktiengesellschaft Hand-held power tool with pneumatic percussion mechanism
US20090242223A1 (en) * 2008-03-28 2009-10-01 Makita Corporation Impact tool
US8037947B2 (en) * 2008-03-28 2011-10-18 Makita Corporation Impact tool with shock absorbing element
US20120125650A1 (en) * 2010-11-16 2012-05-24 Olaf Koch Hand-Held Machine Tool
US9272408B2 (en) * 2010-11-16 2016-03-01 Hilti Aktiengesellschaft Hand-held machine tool
US20140144658A1 (en) * 2011-07-05 2014-05-29 Robert Bosch Gmbh Percussion mechanism apparatus
US10534606B2 (en) 2011-12-08 2020-01-14 Oracle International Corporation Run-length encoding decompression
US9289890B2 (en) 2011-12-15 2016-03-22 Milwaukee Electric Tool Corporation Rotary hammer
USD791565S1 (en) 2011-12-15 2017-07-11 Milwaukee Electric Tool Corporation Rotary hammer
US8636081B2 (en) 2011-12-15 2014-01-28 Milwaukee Electric Tool Corporation Rotary hammer
US9764457B2 (en) 2012-02-17 2017-09-19 Construction Tools Pc Ab Percussion device comprising a damping mechanism
US11113054B2 (en) 2013-09-10 2021-09-07 Oracle International Corporation Efficient hardware instructions for single instruction multiple data processors: fast fixed-length value compression
US20180180128A1 (en) * 2015-06-29 2018-06-28 Terminator Ip Limited Shock absorbing tool connection
US10599488B2 (en) 2016-06-29 2020-03-24 Oracle International Corporation Multi-purpose events for notification and sequence control in multi-core processor systems
US10614023B2 (en) 2016-09-06 2020-04-07 Oracle International Corporation Processor core to coprocessor interface with FIFO semantics
US10783102B2 (en) 2016-10-11 2020-09-22 Oracle International Corporation Dynamically configurable high performance database-aware hash engine
US10176114B2 (en) 2016-11-28 2019-01-08 Oracle International Corporation Row identification number generation in database direct memory access engine
US10459859B2 (en) 2016-11-28 2019-10-29 Oracle International Corporation Multicast copy ring for database direct memory access filtering engine
US10725947B2 (en) 2016-11-29 2020-07-28 Oracle International Corporation Bit vector gather row count calculation and handling in direct memory access engine
US10710172B2 (en) 2017-07-31 2020-07-14 Milwaukee Electric Tool Corporation Rotary power tool
US10828705B2 (en) 2017-07-31 2020-11-10 Milwaukee Electric Tool Corporation Rotary power tool
US11185932B2 (en) 2017-07-31 2021-11-30 Milwaukee Electric Tool Corporation Rotary power tool
US10814468B2 (en) 2017-10-20 2020-10-27 Milwaukee Electric Tool Corporation Percussion tool
US11633843B2 (en) 2017-10-20 2023-04-25 Milwaukee Electric Tool Corporation Percussion tool
US10926393B2 (en) 2018-01-26 2021-02-23 Milwaukee Electric Tool Corporation Percussion tool
US11059155B2 (en) 2018-01-26 2021-07-13 Milwaukee Electric Tool Corporation Percussion tool
US11141850B2 (en) 2018-01-26 2021-10-12 Milwaukee Electric Tool Corporation Percussion tool
US11203105B2 (en) 2018-01-26 2021-12-21 Milwaukee Electric Tool Corporation Percussion tool
US11759935B2 (en) 2018-01-26 2023-09-19 Milwaukee Electric Tool Corporation Percussion tool
US11865687B2 (en) 2018-01-26 2024-01-09 Milwaukee Electric Tool Corporation Percussion tool

Also Published As

Publication number Publication date
EP0888851B1 (fr) 2006-11-08
JPH1177558A (ja) 1999-03-23
DE59813790D1 (de) 2006-12-21
EP0888851A3 (fr) 2003-01-08
EP0888851A2 (fr) 1999-01-07
JP4195125B2 (ja) 2008-12-10
DE29711704U1 (de) 1997-09-04

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